What are the difference between electrical current and RF?

[Ces]

Hi. This might be really basic. But I am really struggling to grasp the difference between electrical currents such as AC and DC and RF. For the case of AC current, it alternates currents at a certain frequency.. which makes me wonder how AC and RF are different.

Also, if you could, could you provide an example where we need to use AC instead of DC?

Thanks!

 

[cnh1995]

Also, if you could, could you provide an example where we need to use AC instead of DC?

Our entire electrical power system is an example. It is not feasible to generate and transmit DC power in a nationwide huge network. We have to go for AC.
(An exception would be High Voltage DC transmission, but that is a different topic).

 

[sophiecentaur]

Hello and welcome to PF.
This question reads very much like a homework type of assignment. That should be posted in the appropriate forum.
But, assuming is isn't, I would ask you what you have found out about this, yourself. What do you know already?

 

[davenn]

Hi Ces
welcome to PF

which makes me wonder how AC and RF are different.

do you really think they are ?
what have you been reading or told that makes you think so ?

define AC
you already have ...

For the case of AC current, it alternates currents at a certain frequency..

so what did you think an RF current is and why it should be different to your definition that I quoted ?Dave